Jquery 想了解domReady.done和domReady.timer的含义吗?

Jquery 想了解domReady.done和domReady.timer的含义吗?,jquery,javascript,javascript-framework,unobtrusive-javascript,Jquery,Javascript,Javascript Framework,Unobtrusive Javascript,我在一本JavaScript书中找到了这个例子 // Checks to see if the DOM is ready for navigation function isDOMReady() { // If we already figured out that the page is ready, ignore if (domReady.done) return false; // Check to see if a number of functions and

我在一本JavaScript书中找到了这个例子

// Checks to see if the DOM is ready for navigation
function isDOMReady() {
    // If we already figured out that the page is ready, ignore

    if (domReady.done) return false;
    // Check to see if a number of functions and elements are
    // able to be accessed
    if (document && document.getElementsByTagName && document.getElementById && document.body) {
        // If they're ready, we can stop checking
        clearInterval(domReady.timer);
        domReady.timer = null;
        // Execute all the functions that were waiting
        for (var i = 0; i < domReady.ready.length; i++)
        domReady.ready[i]();
        // Remember that we're now done
        domReady.ready = null;
        domReady.done = true;
    }
}

// calling the domReady function
domReady(function () {
    alert("The DOM is loaded!");
    tag("h1")[0].style.border = "4px solid black";
});

想了解domReady.done、domReady.timer的含义吗?

domReady.done是一个标志,它将在DOM就绪后立即设置为true。domReady.timer是以window.setInterval开始的间隔的引用/句柄,因此在DOM准备就绪后,可以立即使用window.clearInterval清除该间隔,因为不再需要进行检查。

我们不能这样做,因为您提供的代码中没有包含这些间隔。总的来说,等待DOM是一个简单的setInterval,当DOM函数可访问时,它会被清除,因此DOM已准备就绪。domReady.timer是相应间隔的id,domReady.done是指示dom是否就绪的标志。它只是指示dom是否就绪的标志。但它是一个定制的javascript函数。